package com.dd.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.nio.charset.Charset;
import java.util.List;

@Configuration
@ComponentScan("com.dd")
@EnableWebMvc
public class SpringMVCConfig  implements WebMvcConfigurer {

    //    通过@EnableWebMVC配置的时候起作用，
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        for(HttpMessageConverter httpMessageConverter:converters){
            if(StringHttpMessageConverter.class.isAssignableFrom(httpMessageConverter.getClass())){
                ((StringHttpMessageConverter)httpMessageConverter).setDefaultCharset(Charset.forName("UTF-8"));
            }
        }
    }
    //配置文件上传解析器
    @Bean
    public CommonsMultipartResolver multipartResolver() {
        CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
        //最大文件 2MB
        commonsMultipartResolver.setMaxUploadSize(1024 * 1024 * 999);

        commonsMultipartResolver.setDefaultEncoding("UTF-8");
        return commonsMultipartResolver;
    }
}
